EXCLUSIVE: Frank Langella, so memorable as Richard Nixon in the stage and screen versions of Frost/Nixon, is back in political mode, and this time he’s playing the guy behind The Guy. He’s joining the cast of the Scott Free/Participant Media/Headline Pictures-produced Reykjavik. The Mike Newell-directed drama tells the story of the 1986 peace summit between Reagan and Gorbachev in Reykjavik, Iceland.